Lifetime ISA Calculator
See exactly how much the Lifetime ISA's 25% government bonus adds to your savings, and the real cost of withdrawing early, in cash, not just a scary percentage.
Estimate only. This is an illustrative projection, not a guarantee. Cash LISA rates change, and Stocks & Shares LISA values can fall as well as rise. Lifetime ISA rules, the contribution cap, the property price cap and age eligibility can change, always check the current rules on gov.uk. Not financial advice.
Enter your Lifetime ISA plan
Your annual bonus, projected pot and the real cost of an early withdrawal appear here as you type.
How this is worked out
Each year's contribution (up to the £4,000 cap) earns a 25% government bonus, paid on top, so £4,000 in becomes £5,000 in your Lifetime ISA. We treat each year's contribution and bonus as a single deposit at the start of that year, then grow it at your chosen rate, compounding annually, for the remaining years.
The withdrawal penalty example shows the maths on a representative £1,000: with the 25% bonus it becomes £1,250, but an unauthorised withdrawal loses 25% of that, £312.50, leaving £937.50. You only put in £1,000, so you've really lost £62.50 of your own money: 6.25%, not 25%. A Lifetime ISA is for a first home worth £450,000 or less, or retirement from age 60, you can open one between 18 and 39, and keep paying in until you're 50.